This document is intended to assist air agencies in preparing demonstrations for stratospheric ozone intrusions that meet the requirements of the Exceptional Events Rule.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Guidance on the Preparation of Exceptional Events Demonstrations for Stratospheric Ozone Intrusions (PDF)(45 pp, 2 MB, November 2018, EPA-457/B-18-001)